EP 0741908 B1 19980422 - METAL HALIDE GAS DISCHARGE LAMP FOR PROJECTION PURPOSES
Title (en)
METAL HALIDE GAS DISCHARGE LAMP FOR PROJECTION PURPOSES
Title (de)
METALLHALOGENIDENTLADUNGSLAMPE FÜR PROJEKTIONSZWECKE
Title (fr)
LAMPE A DECHARGE A HALOGENURE DE METAL UTILISEE A DES FINS DE PROJECTION
Publication
Application
Priority
- DE 9500067 W 19950120
- DE 9401436 U 19940128
Abstract (en)
[origin: US5689154A] PCT No. PCT/DE95/00067 Sec. 371 Date May 30, 1996 Sec. 102(e) Date May 30, 1996 PCT Filed Jan. 20, 1995 PCT Pub. No. WO95/20822 PCT Pub. Date Aug. 3, 1995A metal halide gas discharge lamp for projection purposes includes a discharge vessel closed at both ends preferably has between the electrodes a central frosted partial area applied on the outer surface of the discharge vessel. The relationship 0.1<B</=1, preferably 0.4<B/d<0.8, applies to the quotients of the width B of the frosted partial area by the inter-electrode gap d. The lamp is optionally provided on one or both sides with heat build-up coatings. The lamp advantageously forms a unit with an optical reflector.
IPC 1-7
IPC 8 full level
G03B 21/14 (2006.01); F21S 2/00 (2006.01); F21V 11/00 (2006.01); F21V 14/00 (2006.01); H01J 61/12 (2006.01); H01J 61/30 (2006.01); H01J 61/35 (2006.01); H01J 61/52 (2006.01); H01J 61/82 (2006.01); H01J 61/88 (2006.01)
CPC (source: EP US)
H01J 61/125 (2013.01 - EP US); H01J 61/30 (2013.01 - EP US); H01J 61/35 (2013.01 - EP US); H01J 61/523 (2013.01 - EP US); H01J 61/827 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
US 5689154 A 19971118; CN 1069994 C 20010822; CN 1139496 A 19970101; DE 59501987 D1 19980528; DE 9401436 U1 19940331; EP 0741908 A1 19961113; EP 0741908 B1 19980422; JP H09509279 A 19970916; KR 100372959 B1 20030516; WO 9520822 A1 19950803
DOCDB simple family (application)
US 65622096 A 19960530; CN 95191362 A 19950120; DE 59501987 T 19950120; DE 9401436 U 19940128; DE 9500067 W 19950120; EP 95906249 A 19950120; JP 51981195 A 19950120; KR 19960703491 A 19960628